The digits that can be in the ones place is 1 and 5.... I think.
5 students since one student leave each row which means 3 are left . also there are 2 students in the fifth row so you add 3 by 2 which equal 5
It looks like you have missed the necessary options for us to answer this question so I had to look for it. Anyway, here is the answer. - 15pi / 180
Hope my answer would be a great help for you. If you have more questions feel free to ask here at Brainly.
Answer:
.3125
Step-by-step explanation:
